Structure tensile scale is the rate at which the cost of the structure changes relative to the rate at which the tensile energy changes. A low value means that materials with high tensile energies are only slightly more expensive than materials with low tensile energies. A high value means that materials with high tensile energies are way more expensive than materials with low tensile energies, for instance, if high tensile materials are recently discovered and barely out of the laboratory. The structure tensile scale is used along with empty mass, exhaust velocity, structure exhaust scale, structure mass scale, tensile energy and ten ton structure price to calculate the structure cost.

structure cost = pow( ( empty mass / 10,000 ), structure mass scale ) * pow( ( tensile energy / 205,000 ), structure tensile scale ) * pow( ( exhaust velocity / 3,330 ), structure exhaust scale ) * ten ton structure price
 
 

This is used in rocket cost.
 
  Rocket